rickets is a nutritional disorder that can develop if you do not get enough vitamin d calcium or phosphate rickets leads to poor functioning of a bone s growth plate growing edge softened and weakened bones stunted growth and in severe cases skeletal deformities
Hence, a 20-year period of the patent usually gives manufacturers a chance to recoup the cost of developing a new drug. When a drug patent expires, any pharmaceutical company can manufacture and sell the drug. A drug, which is produced and distributed without patent protection is called a generic drug.
Medicines, like food products, have an expiration date on their packaging. The expiration date on medication is the date beyond which the manufacturers can no longer guarantee full effectiveness or safe usage. Generally, over-the-counter medicines should have a shelf life of around four or five years. This means they should last around that long after the date they are purchased.